Alright, let's work through 3583 times 3681 step by step
3583 × 3681 = 3681 × (3583)
+ 3681 × 3 which equals 11043
+ 3681 × 80 what gives us 294480
+ 3681 × 500 producing 1840500
+ 3681 × 3000 which equals 11043000

= 13189023
